Shelf for a desk



FIG. 1 is a front perspective view of a shelf for a desk showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a right side view thereof, the left side view thereof being a mirror image;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a top front perspective view thereof, shown in condition of use.

The broken lines in FIGS. 1 through 5 and 7 depict portions of the shelf for a desk that form no part of the claimed design. The broken lines in FIG. 8 depict environmental structure and form no part of the claimed design. 

CLAIM The ornamental design for a shelf for a desk, as shown and described. 